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Components of Income Tax Expense (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Income Tax Expense Benefit [Line Items]      
Taxes on income $ 134.0 $ 124.2 $ 136.7
Domestic Tax Authority      
Income Tax Expense Benefit [Line Items]      
Current 130.9 112.0 111.9
Deferred (1.1) 0.8 2.0
Domestic 129.8 112.8 113.9
U.S.      
Income Tax Expense Benefit [Line Items]      
Foreign taxes, Current 7.1 1.7 15.3
Foreign taxes, Deferred (2.9) 9.7 7.5
Foreign $ 4.2 $ 11.4 $ 22.8